A-LevelBiologyBiodiversity and conservationOct/Nov 2020Paper 4 Q89 Marks
The soft rush plant, Juncus effusus, grows in many habitats in Northern Europe. An investigation was carried out to assess whether there was a relationship between the height of soft rush plants and the altitude at which they grow on exposed hillsides. The mean height of 10 soft rush plants was calculated at each of eight different altitudes. The results are shown in Table 8.1. [Table 8.1] The statistical test, Spearman's rank correlation (rs), was applied to find out if there was a relationship between the altitude and the mean height of the soft rush plants.
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